Hello ultramax, even the online antivirus like [http://housecall.trendmicro.com/#what-it-does House Call - Trend Micro], requires a small download before it can scan your computer. [http://www.freedrweb.com/cureit/?lng=en Dr.Web CureIt!] also (which is not online antivirus).
also [https://support.mozilla.org/en-US/kb/update-firefox-latest-version#os=win7&browser=fx19 Update Firefox to the latest version], your 6.0.2 version is old and unsupported (vulnerable too).
thank you